Synthesis and pharmacological evaluation of 6a,7-dihydro-6H,13H-pyrazino[1,2-a;4,5-a′]diindole analogs as melatonin receptor ligands
作者:Mohamed I. Attia、Justin Julius、Paula A. Witt-Enderby、Darius P. Zlotos
DOI:10.1016/j.tet.2006.10.081
日期:2007.1
melatonin-derived analogs of the novel 6a,7-dihydro-6H,13H-pyrazino[1,2-a;4,5-a′]diindole ring system is described. The non-methoxy and methoxy analogs, 4a and 4b were prepared in seven steps starting from indoline-2-carboxylic acid 5a and 5-methoxyindoline-2-carboxylic acid 5b, respectively. While 4a exhibited micromolar affinities for both melatonin receptors, the methoxy analog 4b displayed moderate
描述了新颖的6a,7-dihydro-6 H,13 H-吡嗪并[1,2- a ; 4,5- a ']二吲哚环系统的两种褪黑激素衍生类似物的合成。非甲氧基和甲氧基类似物,图4a和图4b中从二氢吲哚-2-羧酸开始七个步骤制备图5a和5- methoxyindoline -2-羧酸5B分别。虽然4a对两种褪黑激素受体都表现出微摩尔亲和力,但甲氧基类似物4b对MT 2受体表现出中等亲和力(K i = 0.41μM),比MT 1高4.4倍。 亚型。